Sills, A, Harrison, P and Califano, M orcid.org/0000-0003-3199-3896 (2016) Exciton Dynamics in InSb Colloidal Quantum Dots. Journal of Physical Chemistry Letters, 7 (1). pp. 31-35.
Abstract
Extraordinarily fast biexciton decay times and unexpectedly large optical gaps are two striking features observed in InSb colloidal quantum dots that have remained so far unexplained. The former, should its origin be identified as an Auger recombination process, would have important implications regarding carrier multiplication efficiency, suggesting these nanostructures as potentially ideal active materials in photovoltaic devices. The latter could offer new insights into the factors that influence the electronic structure and consequently the optical properties of systems with reduced dimensionality and provide additional means to fine-tune them. Using the state-of-the-art atomistic semiempirical pseudopotential method we unveil the surprising origins of these features and show that a comprehensive explanation for these properties requires delving deep into the atomistic detail of these nanostructures and is, therefore, outside the reach of less sophisticated, albeit more popular, theoretical approaches.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015, American Chemical Society. This document is the unedited author's version of a Submitted Work that was subsequently accepted for publication in Journal of Physical Chemistry Letters, copyright © American Chemical Society after peer review. To access the final edited and published work, see http://dx.doi.org/10.1021/acs.jpclett.5b02408 |
Keywords: | Auger processes; nanocrystals; colloidal quantum dots; pseudopotential method; stoichiometry; k-vector analysis |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 07 Jan 2016 11:17 |
Last Modified: | 14 Feb 2019 12:13 |
Published Version: | http://dx.doi.org/10.1021/acs.jpclett.5b02408 |
Status: | Published |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/acs.jpclett.5b02408 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:93122 |